A medical imaging apparatus for computer tomography, includes a first housing frame； a scanning section, movably disposed in an axial direction with respect to the first housing frame； and driving device(s). The scanning section includes an essentially toroidal scanning section housing including at least one uncovered axial surface, and a radiation source and a radiation detector, rotatably disposed inside of the essentially toroidal scanning section housing. The driving device(s) are configured to move the scanning section along an axial direction with respect to the first housing frame to perform a telescopic motion of the radiation source and radiation detector, during an operation of the medical imaging apparatus. The at least one uncovered axial surface of the essentially toroidal scanning section housing is movable along the axial direction.
